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Property enhancement of geopolymer by means of separation/classification of spent-resources

폐자원의 분류/선별을 통한 지오폴리머 특성 개선 연구

  • Kim, Yooteak (Department of Materials Engineering, Kyonggi University) ;
  • Kim, Hyunjung (Department of Materials Engineering, Kyonggi University) ;
  • Jang, Changsub (Department of Materials Engineering, Kyonggi University)
  • 김유택 (경기대학교 일반대학원 신소재공학과) ;
  • 김현정 (경기대학교 일반대학원 신소재공학과) ;
  • 장창섭 (경기대학교 일반대학원 신소재공학과)
  • Received : 2012.09.18
  • Accepted : 2012.10.19
  • Published : 2012.12.31

Abstract

Geopolymer was made using magnetic separation fly ash with NaOH(Sodium Hydroxide) and the water glass as alkali activators in this study. Compressive strength of geopolymers ceramics was measured and analyzed according to the type of materials. Under the conditions of fly ash without magnetic separation and 28 day curing after molding, the compressive strength of the geopolymer reached up to 28 MPa.

본 연구에서는 비산회를 자력선별한 후 알칼리 활성화제인 수산화나트륨과 물유리를 사용하여 지오폴리머를 제조하였다. 자력 선별전의 원료, 자력 선별된 두 가지 종류의 자력 및 비자력 원료를 사용한 지오폴리머 시편에 대한 압축강도를 측정하여 비교하였다. 비자력 비산회 원료를 사용한 지오폴리머 시편에서 가장 좋은 압축강도가 나올 것으로 예상하였으나, 실제로는 자력선별하지 않은 원재료 비산회와 고로슬래그를 사용한 경우에 재령 28일차 압축강도가 27.54 MPa로 가장 우수하였다. 이 결과에서, 자력선별 후 CaO 성분 농축으로 수화반응 증진에 의한 강도발현 증진 효과 보다는 자력선별에 의해 지오폴리머 형성반응에 필요한 실리카와 알루미나 성분이 오히려 줄어들어 지오폴리머 축합반응이 감소하여 오히려 압축강도 측면에서는 물성 개선효과가 없는 것으로 판명되었다.

Keywords

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